Multilayer gradient lattice sandwich panel and preparation method thereof

A sandwich panel and dot matrix technology, which is applied in the field of dot matrix sandwich panel preparation, can solve the problems of large deformation difference of the sandwich layer, poor protection of the rear panel, and greater impact of explosion impact on the rear panel, etc., and achieve high porosity , good protective effect, and reduce the effect of deformation difference

Active Publication Date: 2017-12-22
三亚哈尔滨工程大学南海创新发展基地
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  • Abstract
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  • Application Information

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Problems solved by technology

In terms of anti-explosion impact performance, the open topological configuration of the lattice sandwich structure provides enough space for the core to undergo large plastic deformation under the action of the explosion load, which makes the lattice sandwich structure more effective in absorbing explosion impact energy. has greater advantages, but the effect of single-layer lattice sandwich structure in anti-explosion impact is still limited. Based on this, the design of multi-layer lattice sandwich structure in anti-explosion impact is particularly important, but non-gradient The deformation of each sandwich layer of the multi-layer lattice sandwich structure is very different under the explosion load, the buckling deformation of the core rod is not fully utilized, the rear panel is greatly affected by the impact of the explosion, and the protection effect on the rear panel is poor

Method used

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  • Multilayer gradient lattice sandwich panel and preparation method thereof
  • Multilayer gradient lattice sandwich panel and preparation method thereof
  • Multilayer gradient lattice sandwich panel and preparation method thereof

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specific Embodiment approach 1

[0024] Specific Embodiment 1: This embodiment is a multi-layer gradient lattice sandwich panel including a metal front panel 1, a metal rear panel 2, a metal partition 3 and a pyramid-shaped lattice core 4;

[0025] Described pyramidal lattice core 4 is made up of a plurality of pyramidal lattice structure unit cells 5; Each pyramidal lattice structure unit cell 5 is to be made up of four rods with a pyramid-shaped one piece; Pyramid The bar side length dimension of type lattice core 4-1 is thicker, and the bar side length dimension of pyramid type lattice core 4-2 is thinner; Pyramid type lattice core 4-1 and pyramid type point The array cores 4-2 are distributed circularly and alternately from front to back along the vertical panel direction.

[0026] The upper end surfaces of all the pyramidal lattice structure unit cells 5 in the pyramidal lattice core 4 are fixedly connected with the metal front panel 1 or the metal partition 3, and all the pyramidal lattice structure uni...

specific Embodiment approach 2

[0035] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the upper end surface of all pyramidal lattice structure unit cells 5 in the described pyramidal lattice core 4 and the metal front panel 1 or the metal partition 3. The fixed connection is connected by brazing or laser welding; the lower end faces of all the pyramidal lattice structure unit cells 5 in the pyramidal lattice core 4 are fixedly connected with the metal rear panel 2 or the metal partition 3 through Brazing or laser welding for connection. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and one of the specific embodiments one to two is: the metal front panel 1, the metal rear panel 2, the metal partition 3 and the pyramid lattice core 4 are made of the same light metal material or The same heavy metal material; the light metal material is aluminum alloy; the heavy metal material is stainless steel. Other steps are the same as those in Embodiments 1 to 2.

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Abstract

The invention discloses a multilayer gradient lattice sandwich panel and a preparation method thereof. Two punched diamond plates with different thicknesses are treated with mold pressing and folding technologies, two pyramid lattice core layers with different core rod part side lengths are prepared, the two core layers are welded with metal panels or partition boards in a circularly interphase distribution form, and the multilayer gradient lattice sandwich panel is obtained. Compared with a non-gradient multilayer lattice structure, the multilayer gradient lattice structure has the advantages that deformation difference among different core layers under the explosion load is greatly reduced, buckling deformation of the core layers are sufficiently utilized, influence of the rear panel by explosion shock is reduced by 50%, and a better protection function is realized. Besides, the characteristic of high porosity of the lattice structure is reserved, and further function composite is facilitated. The sandwich panel has broad application prospects in the fields of safety protection, military and the like by means of the excellent energy adsorption mechanism, low density, high specific strength and specific stiffness and multifunctional composite potentials.

Description

technical field [0001] The invention belongs to the field of lattice sandwich panel preparation, and in particular relates to a multilayer gradient lattice sandwich panel and a preparation method thereof. Background technique [0002] In terms of structure, the lattice sandwich material has the characteristics of ultra-light, high specific strength, and high specific rigidity; in terms of function, it has the characteristics of efficient heat insulation and heat dissipation, good sound absorption effect, and multi-functional integration. In terms of anti-explosion impact performance, the open topological configuration of the lattice sandwich structure provides enough space for the core to undergo large plastic deformation under the action of the explosion load, which makes the lattice sandwich structure more effective in absorbing explosion impact energy. has greater advantages, but the effect of single-layer lattice sandwich structure in anti-explosion impact is still limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/02B32B15/18B32B15/20B32B3/12B32B7/08B23P15/00
CPCB23P15/00B32B3/12B32B7/08B32B15/011B32B15/016B32B15/02B32B2250/42B32B2307/558
Inventor 杨丽红韩笑于国财隋磊吴林志
Owner 三亚哈尔滨工程大学南海创新发展基地
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